package org.redhat.auth.security.core;

import java.util.Collection;
import java.util.Iterator;

import org.redhat.auth.security.user.UserDetailInfo;
import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;

/**
 * 决策，决定当前用户是否有权对当前操作进行处理
 * 
 * @author lingen.liu
 * 
 */
public class AuthAccessDecisionManagerBean implements AccessDecisionManager {

	@Override
	public void decide(Authentication authentication, Object object,
			Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		/* 测试用户不进行权限限制 */
		Object o = SecurityContextHolder.getContext().getAuthentication()
				.getPrincipal();
		if (o instanceof UserDetailInfo) {
			UserDetailInfo user = (UserDetailInfo) SecurityContextHolder.getContext()
					.getAuthentication().getPrincipal();
			if (user.isTestUser())
				return;
		}
		if (configAttributes == null)
			return;
		Iterator<ConfigAttribute> ite = configAttributes.iterator();

		while (ite.hasNext()) {
			ConfigAttribute ca = ite.next();
			String needRole = ((SecurityConfig) ca).getAttribute();
			for (GrantedAuthority ga : authentication.getAuthorities()) {
				if (needRole.equals(ga.getAuthority())) {
					return;
				}
			}
		}
		throw new AccessDeniedException("no right");
	}

	@Override
	public boolean supports(ConfigAttribute arg0) {
		return true;
	}

	@Override
	public boolean supports(Class<?> arg0) {
		return true;
	}

}